Synthetic branched polyisoprenes and process for obtaining them
US7319126B2 · kind B2 · utility
1Cited by
3References
24Claims
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Key dates
| Filing date | Apr 18, 2005 |
| Grant date | Jan 15, 2008 |
| Priority date | — |
| Expiry date | Apr 18, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08C19/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Branched synthetic polyisoprenes are described having a macrostructure and a microstructure very similar to those of natural rubber. According to one aspect, these polyisoprenes have an apparent stress F/S0 greater than or equal to 0.4 MPa at a relative elongation α of 150%, applied to a dumbbell-shaped test specimen consisting of the crosslinkable polyisoprene. According to another aspect, these polyisoprenes fulfill the relationship:Cotan δ≧0.3761. ηinh+0.15,: (i)
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.